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Two-wire Data Control Bus
The two-wire data bus is used to connect all control
units in the Series 9000 control system. The data
cable loops-through from one unit to the other. The
order of connection is not important, however, the
total length of the cables must not exceed 350 metres.
Each unit connected directly to the data bus, either
base station, camera head or OCP, is identified by a
number. In order to ensure, for example, that OCP 1
controls the camera connected to base station 1, the
same unique number must be assigned to both OCP 1
and base station 1. The assignment number is set
internally on the units during installation.
The assignment number of a camera head connected
to a base station is automatically set to the number of
the base station to which it is connected. The number
Other Control Features
Private Data
A private data channel is also available between the
camera and the base station. This is a two-way serial
channel operating at 2400 B/s with TTL level. This
channel can be used for digital data links (Refer to the
Installation Manual for more detail).
Configurations
on the base station, which is connected to the data
bus, must be set to the number of the control panel
that is to control it.
A camera connected directly to the data bus must
have its assignment number set to the number set on
the OCP that is to control it. It is important to set a
unique number for each base station/OCP or camera/
OCP group as unpredictable control situations could
arise otherwise.
The MCP is also connected to the data bus, however,
it is not necessary to set an internal assignment
number. The camera or cameras to be controlled are
selected on the MCP front panel itself when operating
the unit.
Analogue Ch0-Ch1
Two analogue control channels are available from the
base station to the camera. These provide a control
voltage from 0V to +5V that can be used for pan
control for example. For more information on these
channels refer to the Installation Manual.
Operator's Manual LDK 20(S) - Studio Camera
Note
Analogue Ch1 can also be used to switch Aspect
Ratio externally.
3-5
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